#include    <stdio.h>
    #include    <sys/types.h>
    #include    <unistd.h>
    int main()
    {
        int ret_from_fork, mypid;
        mypid = getpid();              
        printf("Before: my pid is %d\n", mypid);
        ret_from_fork = fork();
        sleep(1);
        printf("After: my pid is %d, fork() said %d\n",
                getpid(), ret_from_fork);

        return 0;
    }
